* remove devices before mknod-ing them
* use ${i#...} and $((...)) instead of `eval ...`
* tz* has perms 660 root.operator (instead of 666 root.wheel)
* consolidate a few devices into one case, with internal switching
for the slight difference (usually unit name and major number)
* reset the umask after MAKEDEV.local
* don't treat ttyv* specially - it's an i386-ism